At 4:22 PM -0600 2/7/07, billc imposed structure on a stream of
electrons, yielding:
At 9:45 AM -0800 2/7/07, Christopher Bort wrote:
Set up CNAME on old domain name record:
mail.olddomain.com CNAME mail.newdomain.com
Remove A record for mail.olddomain.com
MX record on old domain points to mail.newdomain.com
That's all optional and entirely up to you. The record for
mail.olddomain.com can remain as an A, especially if you're reasonably
confident that your server will keep the same IP address for a while.
CNAMEs can get messy, so I usually try to avoid them when an A record will
do the job.
Actually, there are those that consider it mandatory that MXs point
to A records.
Yeah, like anyone has read the relevant RFC's. Or the code for a DNS resolver.
QDNS won't even let you put in a C name for an MX these days.
(sorry, i'm not one of those RFC quotin' kind of guys, but that's
probably where it stems from)
Relevant RFC's: 974, 1035, 1912, 2181
Bottom line: it has been explicitly wrong to point an MX at a name
that has a CNAME for every one of the past 20 years, the entire
history of the MX record type. People still do it, but they really
need to have their mail broken frequently and mysteriously...
--
Bill Cole
[EMAIL PROTECTED]
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